Oh, I agree. There is definitely another airport under there. It has to be the default because this is clean install just a few days old. There is no other scenery in the system.
If you have the KDFW scenery on top of the Scenery Library, which is where the installer automatically puts it, then no, the default scenery can't create such problem, because the AFCAD that comes with KDFW is made to properly exclude the default AFCAD for the default KDFW.
This problem can only be caused by another AFCAD, coming from another product, which was made by modifying the default scenery, which is why you see default jetways in the wrong position.
OR, it's be possible you modified (or installed some modifications) for the default KDFW AFCAD and save it back with the same name ? Then yes, in this case, there might be such problem, because if default parking positions, and especially jetways, are moved from the default position, our AFCAD can't exclude them anymore, which is the same as having another AFCAD in conflict. In this case, you'll have to restore the original default AFCAD for KDFW.